Removal and replacement of the ceilings in the elevator lobbies was needed to install the fire suppression (sprinkler system) that is included in the construction of the 5th/6th floor building addition. Unlike the rest of the building, the ceilings in the lobbies were made with a material containing a low level of asbestos. They needed to be removed before the sprinkler lines above could be put in.
Workers will still occasionally be seen in these areas--touching up paint, following up on punch list items needing minor fixes, etc. But the areas have all been turned back to the library as open for normal use.